CO2 Transporation Flashcards
Carbon dioxide mostly reacts with what to produce what
Reacts with water to produce Bicarbonate and Hydrogen ions
Bicarbonate formation occurs naturally but what enzyme present in RBCs catalyses this
Carbonic anhydrase
What system aids in maintaining homeostasis within the human body and how
Carbonic acid - bicarbonate system which resists shifts in blood pH
Explain the chloride shift
Bicarbonate ions generated quickly move out of the plasma and are carried to the lungs to be expired. As these ions move out, chloride ions move from plasma to RBCs.
When Hydrogen ions are formed due to the joining of HHb and O2 in red blood cells when oxygen is being picked up from the lungs, what happens to this H+ and what else happens
H+ combine with Bicarbonate to produce Co2 and water. The taking of bicarbonate from the blood plasma to join with hydrogen causes Chloride ion to be removed from the RBC
The production of Hydrogen ion and bicarbonate ion when oxygen is released from the blood plasma causes what to happen in terms of HHb and chloride ions
The hydrogen ion joins with Hb and chloride ion moves into the RBC as bicarbonate moves out
What is the majority of CO2 transported as
70% as bicarbonate ions in plasma
7-10% as gas in plasma
20% binds to Haemoglobin
CO2 binds to what in the Haemoglobin molecules and forms what
Binds to amino acids forming carbamino Haemoglobin
What is the haldane effect
Dissociation of O2 allows more CO2 to join with Hb
Why is there bare CO2 in plasma
CO2 is mad soluble
Shallow slow breathing allows what gas to accumulate in blood
CO2
